Introduction - If you have any usage issues, please Google them yourself
marble Write the implementation of the class Marble in the file marble.cpp.
Specification:
marble.cpp must contain the definition and implementation of all constructors and functions of Marble class.
Include marble.h at the top of this file.
Put the class name and :: after the return type of the function, and before the function name when you define a function outside of the class declaration, e.g.
Marble::Color Marble::random_color()
Color is the return type of this function and the function name is random_color.